/*
 *   RapCAD - Rapid prototyping CAD IDE (www.rapcad.org)
 *   Copyright (C) 2010-2014 Giles Bathgate
 *
 *   This program is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation, either version 3 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef ONCEONLY_H
#define ONCEONLY_H

/**
 * @class OnceOnly is a little functor that
 * the first time you invoke will return
 * true, but all subsequent times will return
 * false.
 */
class OnceOnly
{
public:
	OnceOnly();
	bool operator ()();
private:
	bool called;
};

#endif // ONCEONLY_H
